1990 Montero Suddenly Quit Running

I was driving along at about 65mph when the engine suddenly quit, just like turning off the ignition. No clunks, clangs, clacks, no nothing. After I came to a comlete stop, the engine would turn over, but it acted like the ignition was not working at all. I did attempt to restart it while it was still moving originally, and even pumped the gas pedal several times as a last resort as I was slowing down (yes, the ignition was in the ON postition). And I did try to let it start also in fifth gear while it was still moving along at over 30mph. The next day (outside temp was around 25 degrees F) I attempted to start it,in the parking lot where some friend towed me, and it finally started to fire up, like a flooded engine, but would quit immediately when I switched from start to run with the ignition switch. I had a friend check the spark, it sparks well. You can smell gas (the number one spark plug was removed) but there is no hint of it even trying to run. Can a computer cause these symptoms? Is there a way to check the computer to see if it is bad before actually replacing it (they are damn expensive)? Anyone else experience anything like this. It is a 3.0L engine. Thanks, Buffalo PS: A friend of mine just confirmed that the timing belt is OK and that the timing marks are all lined up.